What's happening? Idioms: Bad apple martin 10 April, 2013 Example sentence: "Mik is a real bad apple. He always causes trouble at work." Embed this illustration on Your Site: Kaplan English Idioms Illustrations Click the link for the full Food Idioms illustration! 글쓴이 martin (317 Posts) 공유하기 글쓴이 martin (317 Posts) View the discussion thread.